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Nikitich [7]
3 years ago
6

In a certain population, 10% of the people can be classified as being high risk for a heart attack. a) Three people are randomly

selected from this population. What is the probability that exactly one of the three are high risk
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
3 0

Answer: 0.243.

Step-by-step explanation:

The probability in this case is approcimated by the probability distribution formula for random variables. This formula is denoted as:

P(X=r) = nCr * p^r * q^n-r

Where n = selected number to be sampled and in this case, n= 3

r = varied number of sample and in this case, r=1

P = probability of success and in this case p = 0.10

q = 1-p=1-0.1 = 0.9

P(X=1) = 3C1 × 0.1¹ × 0.9²

P(X=1) = 0.243.

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Which of the following expressions are equivalent (equal) to 3(2x - 7)
velikii [3]

Answer:

6x - 21

Step-by-step explanation:

3(2x - 7)

Use the Distribute Property of Multiplication by multiplying the number outside the parenthesis with the numbers inside.

3 × 2x = 6x

3 × -7 = -21

Combine:

6x - 21

Hope this helped.

3 0
3 years ago
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You and your friend are playing "Fire-Water-Sponge." In this game, each of the two players chooses fire, water, or sponge. Both
aleksklad [387]
187 is the answer make me Brainlyest
4 0
3 years ago
The ratio of boys to girls in the gym was 4 to 5. How many boys were in the gym if there were 125 girls in the gym?
Anna007 [38]

Answer:

If there are 125 girls, and the ratio is boys to girls, then you can divide 125 by 5 to get the multiplication factor. This would be 25. Now you can multiply 25 by 4 to get how many boys were in the gym, which would be 100. To get back to your original ratio, you can divide 100/125 by 25 on top and bottom to get 4:5, or 4/5. :)

Step-by-step explanation:


8 0
2 years ago
Problem solving this
polet [3.4K]

Answer:x=20

Im pretty sure thats the answer




7 0
3 years ago
Read 2 more answers
Solve for X
ss7ja [257]

The value of x is

1. x= -37/48

2. x=0

3. x = 33/4

4.  x= -20/7

<h3>What is equation?</h3>

A mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value.

1.  6(8 x + 6) + = - 1

   48x + 36 = -1

 x= -37/48

2.  9x/7 + 6 = 6

9x/7= 6-6

9x/7 =0

x= 0*7/9

x= 0

3. 2x/11 (11 - 7) = 6

    x * 4= 6*11/2

    4x= 33

    x = 33/4

4. 11x/4 (4 - 2) = 9x + 10

 11x/4 * 2 = 9x +10

11/2*x = 9x +10

-7/2x = 10

x= -20/7

Learn more about equation here:

brainly.com/question/10413253

#SPJ1

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1 year ago
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